Abstract
Metallic sandwich structures with pyramidal cellular cores have proven to be highly effective in the industry of advanced lightweight materials thanks to their high strength-to-weight ratios. This paper presents the investigation of the bending performance of a sandwich structure based on a novel pyramidal cellular core. The effective bending and shear stiffness are investigated using numerical and experimental approaches. Furthermore, the finite element model created for the four-point bending scenario is in good agreement with the experimental one and can be subsequently used for further product development. This represents a cost-efficient method used for structural optimisation and may lead to improved mechanical properties and higher lightweight capabilities. The study includes a comparison to other existing periodic core topologies which shows that the investigated pyramidal structure has high potential to be used for the construction of sandwich panel assemblies.
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